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Finding the Fourth Proportional to 153,307.78, 211,570.81 and 85,327.62

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Solution

The fourth proportional to 153,307.78, 211,570.81 and 85,327.62 is: 117,755.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,307.78 : 211,570.81 = 85,327.62 : x
  2. Step 2: Convert to fraction form
    153,307.78/211,570.81 = 85,327.62/x
  3. Step 3: Cross multiply
    153,307.78x = 211,570.81 × 85,327.62
  4. Step 4: Simplify right side
    153,307.78x = 18,052,833,465.45
  5. Step 5: Solve for x
    x = 18,052,833,465.45/153,307.78
  6. Step 6: Final answer
    x = 117,755.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.